Two-polymers, phenothiazine derivatives (PQ) and poly 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene (MEH-PPV), who show complementary absorption to the solar spectrum are blended for broader absorption. The energy transfer from PQ to MEH-PPV is designed and observed at ultrafast time scale of similar to 2 ps. Foster resonance energy transfer (FRET) process is regarded as the mechanism. Band gap of PQ is determined as 2.5 eV. With this design, a ladder type energy transfer and collection is suggested. (C) 2011 Elsevier B.V. All rights reserved.